Is there a way to change the Y-Axis scale in the Bills & Income: Projected Balances?

Y2KMagRed

I had a large transaction move through the account and it made the scale too large for my average activity in the account

Chris_QPW

No that feature doesn't exist.
You can vote on that feature here (doesn't seem to have been that popular):
https://community.quicken.com/discussion/comment/20033121